New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 196th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the SUM, SMALL and VLOOKUP functions to create a gradebook (or grade book) based on a total score minus the two lowest scores.